import { Request, Response, NextFunction } from "express";
import { z } from "zod";
import { db } from "@server/db";
import { Org, orgs } from "@server/db/schema";
import response from "@server/lib/response";
import HttpCode from "@server/types/HttpCode";
import createHttpError from "http-errors";
import { sql, inArray } from "drizzle-orm";
import logger from "@server/logger";

const listOrgsSchema = z.object({
    limit: z
        .string()
        .optional()
        .default("1000")
        .transform(Number)
        .pipe(z.number().int().positive()),
    offset: z
        .string()
        .optional()
        .default("0")
        .transform(Number)
        .pipe(z.number().int().nonnegative()),
});

export type ListOrgsResponse = {
    orgs: Org[];
    pagination: { total: number; limit: number; offset: number };
};

export async function listOrgs(
    req: Request,
    res: Response,
    next: NextFunction
): Promise<any> {
    try {
        const parsedQuery = listOrgsSchema.safeParse(req.query);
        if (!parsedQuery.success) {
            return next(
                createHttpError(
                    HttpCode.BAD_REQUEST,
                    parsedQuery.error.errors.map((e) => e.message).join(", ")
                )
            );
        }

        const { limit, offset } = parsedQuery.data;

        // Use the userOrgs passed from the middleware
        const userOrgIds = req.userOrgIds;

        if (!userOrgIds || userOrgIds.length === 0) {
            return response<ListOrgsResponse>(res, {
                data: {
                    orgs: [],
                    pagination: {
                        total: 0,
                        limit,
                        offset,
                    },
                },
                success: true,
                error: false,
                message: "No organizations found for the user",
                status: HttpCode.OK,
            });
        }

        const organizations = await db
            .select()
            .from(orgs)
            .where(inArray(orgs.orgId, userOrgIds))
            .limit(limit)
            .offset(offset);

        const totalCountResult = await db
            .select({ count: sql<number>`cast(count(*) as integer)` })
            .from(orgs)
            .where(inArray(orgs.orgId, userOrgIds));
        const totalCount = totalCountResult[0].count;

        return response<ListOrgsResponse>(res, {
            data: {
                orgs: organizations,
                pagination: {
                    total: totalCount,
                    limit,
                    offset,
                },
            },
            success: true,
            error: false,
            message: "Organizations retrieved successfully",
            status: HttpCode.OK,
        });
    } catch (error) {
        logger.error(error);
        return next(
            createHttpError(
                HttpCode.INTERNAL_SERVER_ERROR,
                "An error occurred..."
            )
        );
    }
}